Heeelp! Powerpoint is driving me insane!

Hi
I have an interview tomorrow and have made a powerpoint with slide transitions and music etc. BUT the music doesn't play continuously throughout the presentation, it starts again from the beginning for each new slide. I thought I knew what I was doing but...obviously not! Can anyone help before I totally lose the plot, or throw my computer out of the window!!?

Is the Powerpoint for your lesson or for a presentation to the panel?
If the latter, don't bother wasting time on glitzy transitiony stuff, panels are sick of it.
If it's for the lesson - similar, really.

I was told before my interview not to bother using powerpoints because it masks the actual ability to teach well. I think powerpoints are somtimes too passive.
Just an opinion and what i've picked up around different schools.
hope this helps